Black bumps on the penis, this situation should be timely consultation, vigilance is the manifestation of certain diseases, such as sebaceous cysts, folliculitis, warts and other diseases. 1. sebaceous cysts: due to sebaceous gland excretory duct obstruction, sebaceous gland secretions accumulate in the hair follicle area, swelling and the formation of cysts, and cysts in the sebaceous gland secretions, so it will cause the penis to grow black bumps. 2. folliculitis: may be poor penile area hygiene and infection with staphylococcus aureus, resulting in the existence of penile folliculitis, inflammation stimulation of the penile epidermis, the penile epidermis long black pimples, but also may be localized pain, itching and other symptoms. 3. Condyloma acuminatum: a transmissible disease caused by human papilloma virus infection. Warts can cause local skin damage, local skin lesions are white, pink, dirty gray, may also lead to the penis long black pimples (hyperpigmented skin lesions), there will also be a papillary or cauliflower pattern of superfluous organisms. There may also be other factors, it is recommended that the patient timely consultation, please doctor to clarify the cause of the disease, give targeted treatment.